Mechanical stoker.



fr. v. ELLIOTT.

MECHANICAL STOKBB. APPLmATmN FILED imma. 190s.

942,060, Patented Dec. 7, 1909.

4 SHEETS-SHEET Z.

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W /g/M//fy ATTORNEYS '1'. v. ELLIOTT, MECHANICAL STOKEB. y APPLICATION FILED IAR. 23, 190B.

l Patented Dc. 7, 19,09.

TTOR/UF YS mms ruina, In: ,ulmy wnmcm n.

smiling; PATENT- OFFICE To all whom it may concern:

lie it known thatI I, Tininnius V. ELLIOTT, a citizen of the United States, and aresident of the city of New York, Flatbush, borough of Brooklyn, in the county of Kings and btate of New I ork, have invented' a new andA formly over the grate surface in the fire box,

to insure proper burning of ,the fuel and complete combustion thereof, to agitate the grate constantly and at a slow motion, with la view to keepI the tire clean from fdead ashes and to prevent coking, and to automatically remove the ashes from the furnace. The invention'consists ofrnovel features and parts and combinations of the same, which will be more fully describedliereinafter and then pointed out in the claims.

Alpractical embodiment of the invention isrcpresei'ited inthe accompanying drawingsy forming a part of this specification, in

which similar 'characters of reference indi` cate ycorresponding" parts in all the views.

Figure l is a front yelevation of the improvement, parts being in section; Fig. 2 is a reduced longitudinal central section of the saine; 3 is across section of the fire box,

. grate and asli remover; Fig. l is an enlarged sectional lside elevation of one of the centiifugalfeed `wheelsfor forcing the reduced fuel into the lire box; Fig. is an enlarged central plan. vicw'of the Crusher, and Fig. 'G v is a sectional plan view of a modified :tornil '4o ofthe improvement.

The furnace A on which the improved stoker is applied, is provided in its fire box B with a grate C, made Vshape in cross section to provide inclined sides or sections C and C2 onto which the fuel, suoli as coal, in a reduced or divided state, is scattered'by the force of revoluble centrifugal feed wheels l), D held on the outside of the front A of the furnace, the fuel being fed to the said feed wheels D, D by endless conveyers E,

E into which discharges the lower lend o f` .a crusher F, employed for reducing ordinary lump coal to a desired line state, the

saidlump coal being supplied to the crusher,

F from a suitablechute G, as indicated in Y i yTHAiJnIoUsfv.iiLLiocrfig` or NEW romeu. Y.'

` iviiicniiivlciir;l scioKiin.- Y l p specification of Letters Patent. l Applcatipifiiled March 23, 1908. eria1 No. 422,664.

Pai-.enten nec, fr, 1909.

Fig. 2, the chute being lprovided ywith asint- ,able gate G for controlling the amountof the lump coal passing into ythe"upper end of rthe' cruslier F.' AThe crusherl F is provided with 'a casing having an upper section F and a lower section F2, both sections being made in frusto-conicalshape, united at their apexes, as plainly indicated in'lfigs. l and 2. On the inside of the Vcasing section F are arranged notched crushing bars or ribs F3, and plain crushing ribs F* a'rearranged ,on the inside of the lower casing sec-tion F2. The ribsF3 in the upper `easing section FH operate in conjunction with notched ribs Hy of a crushing wheel H secured on a `shaft I extending 4centrally inthe casing 0f the" Crusherr F. The ribs F* operate' in conjunction with ribs Il2 on a conical crushing wheel n H secured to the lower endof the shaft Iv and extending within the lower casingfsecl tion F2. made vcylindri all, and 'consequently' lum coal fedv into the upper ,end of the'casing 1s gradually reduced and finally passes Iinto the lower casing section F2, in which it is reduced to a still li'iierstate. On the upper end of the cruslier shaft I is secured a bevel gear wheel I- in mesh With a pinion J secured on a horizontally-extending sha-ft J', carrying a clutch ineinberJf, under the control of the operator by the use The upper crushing wheel H' is of a shifting lever J3, the vsaid clutch inenif. bei' J gbeing mounted to slide on and to rotate with tlieshaft J. The clutch memben J 2 isiiorinally in mesh with a 'clnt-ch'inember K held on the inembersK2 ofa friction driveK, having intermediate -wheelsvKs for connecting the member Kz -With amern-,n

bei' K4, mounted to rotate loosely on the shaft J, the same as the member K2.V The wheels K3 of the friction drive K can`be shifted into angular positions, to increase or decrease the speed transmitted by the niember K* to the member K2. i As this construc- 4tiony ofthe friction drive K is Well known,

further description of the saine is not deeniedV y y necessary. On the upper end of the member K* is secured a sp'rocketwheel L connected' by aV sprocket chain L with a sprocket wheel L 1'05 v L2,-fastened ona friction clutch member N" inountedtorotate loosely` on the main driv-A ing shaft N, journaled in suitable bearin s", on the front A' of the furnace, the shaft 1 being connectedy with suitable engine or. other means for imparting a continuons ro- 'i .Crusher F to the centrifugal Wheels D and `D.A ,Each of the centrifugal wheels D and i and the erusher F, andv consequently the coal ,crushed-,in the crusher F 4is equally distrib-y taryunriotionto the shaft N.. The clutch memberfN is adapted to be engagedby a clutch member N2, mounted to rotate With 'the shaft N, and under the eontrolof the )peratofr topermitthe latter` to throw the clutch member N2 in or out ofA gear with the clutch member N", to rotate the clutch member N and to imparta rotary motion by the 4sprocket Wheels L'2L and the sprocket chain shaft J Whenever the clutch membersJ2 and K are in mesh. NOW the rotary motion of the 'shaft J transmitted by the pinion J I F2 is provided-With Outlets F, F6 extending' and the gear Wheel 1" tothe Crusher shaft I. .to'rotate the' crusher Wheels-H and H3 for i' crushing the coal, .as above explained.

The lower. end of the lower casing section sideWi'se and opening into the inner ends of thetubular casinos E2 E3 of the eonvevers and4 E.- In the casings E2 andE3 are mountedl endless conveyers E4, "E5, secured .on a shaft'O, ]ournaled 1n suitable bearings on the front A of the furnace. One end of L to thev friction drivefK for rotating the.

theshaft O 'is provided with a 'sprocket i' vv eel O connected by a sprocket chain O.2 with a sprocket Wheel O3 secured on the clutch member N', so that When th'e latter is driven l from themain shaft N by the clutch mem.-

he'r aN2, as above described, then a rotary mo' tion iis transmitted' tothe shaft O by the sprocket Wheels O3, O .and .the sprocket chain'O2. lThus-When the Crusherv F is in .action the endless conveyers E and E are Valso driven to feedl the coal crushed in the "D is provided With a cylindrical casing- D2 having at lts inner side a central inlet -D3 conduit D5 is at the periphery of the Wheel, so 'that the divided coal is discharged from the. `fuel'conduit-peripherally and into an outlet D? leading from the casing D? andy extending through the front Wall of the tfurnace A into thefre box- B, as plainly 'shown in. Figs. 2` land 4.- As the Wheels D4 are secured on the v shaftO, tisevidentthat they rotate in unison with the endlesseonveyers `E and E uted or fed to the 'endless conveyers EWE,

i. vhichdeliver the'reduced coal to the wheels y l'through 'the outlets Dinto the fire box B."

for thec'oal to fall onto the s ectlons D4, Which.2 in turn force the reduced coal C and C2 ofthe grate C.- y The grate C is preferably of the' construction more fullv shown and described.. in the States, f or a Stoker, No. 235,942, iled'by me on December S, 1904, and hence further detail description of the .grate C is not deemed necessary, it being- 'sutlicient to state that each of Vthe'grate sections C', C2 is provided with rocking, perforated grateba'rs extend- -ingl'engthwlse of the fire-box B, the grate application for Letters Patent of the-nited f bars ineac'h section C', C2 beiiig connected A ivith eachl other by eonneetingbars, .which 1n turn are connected byl links P \see F igs) with arms P on longitudinally-extending shafts lf2 journaled' in suitable bearings arranged 1n the'lower portiolrof lthe fire box Y B.' Theshafts P2 extend throughthe'front A of the furnace into a casingAa, and on the outer ends of the shafts .P2 are secured arms P3 connected with eccentrics P4 held on longitudinal shafts I)5 journaled in the casing A3. Olathe shafts P5 are secured v g 1 .Pc 1 worm -whee s 1n mesh wlth a Worm P secu-red ,on 'a vertically-disposed shaft Q journal'ed in-suitable bearin s arran ed on the easing A3. AThe'ishaft 'exten s through ythe top of the casing A3 and on its upper outer end is secureda -blutch member Q adapted to be' engagedv by afclutchmember Q, mounted to' slide on and'to. turn \'vith a shaft Q3 journaled in thel'ower port'ionlN of the' casing forl thecrusher F. The clutch member Q? isengaged lby a shift-ing lever Q* under the eontrolof the o era or, for throwing the clutch members Q and Q2 out of mesh with each other .wheneverit is' dcsired to stop 'the rocking ofthe grate bars.

The upper end of the 'shaft Q3 is provided with apinionj Q5" (.see-`-Fi`g.'2), in mesh with an internal gear wheelQvx formed on a worm 'wheel QT in mesh with 'a Worm (J4 secured on'th'e .shaft O, asshown in Figs. l and 2.

New lwhen the shaft- O is rotated, las p'reviously explained, then a slow rotary motion is given by the worm 0* to the worm wheel Q7 which by the internal gear' wheel Q and the pinion, Q, rotates the'yshaft Q, vand the lrotary motion of 'the llatter is transmitted mittedb'y-thearmsP and the links P'to the connecting bars, for the gr te bars to rock by the clutch members Q', Q to the Shaft p Q, which rotates the' shafts P by the-useof the worin P71 and lthe worm Wheels :P. When the ,shafts P'rl are rotated `then the eccenti-ics ly1 impart rocking lmotions to the" shafts l2 by theuse of the arms P, and the rockipg motion of 4the shafts P2 is ltrans'- thev latter. Thus when-the machine is runmng, the grate bars are rocked, to cause the coal delivered onto the uppermost grate bars the' sections C', C?, to gradually slip dow'n the grate bars toward the apex of the g1.ate,'and,thb rockinggrate-'bars cause they ashes to fall down into the ashffit R and onto the inclined bottoms R and R2` thereof and from which the ashes are scraped down by Scrapers S, onto aspiral conveyer T -inounted to turn in theconveyercasing' Tfn into which leadv theplou'er; ends :fof the bot :toms R, R". The Scrapers y.S,"tb` ofl the 'con' -veyer T are preferably 'of the' construction more ful-ly shovnanfd "described-in the ap# lication for Lettersl Patent ofithe 'United 'I fatt/S: No.` 23'5,949,"5above referred tto, so

"u zlthat'further' detail description`of` the said' Scrapers- 'Si fis not deemednecessary, it =rbe1ng Sufficient 'to' State that the said'scna'persl S, S areinvthe forni of longitudinal bars' secured "to sproelret" 4chainsl passing over sprocket Wheels' attached to longitudinally extending shafts',` of which the -innermost v,shafts are driven b'yj a4 Worin gearing 'Il from bevel' lgea-rsa?l wheels DD,-yvhieh. deliver the reduced coalI onto the-'uppermost 4"grate bars of the grate sections 5G C?, `and fthe, rockingr grate bars cause the'pftnlo'l gradually slide down the -gratebars toyvard the aiJeX of the grate. By

the arrangement described ,the burning' fuel lsjnnlformly dietrlbuted over the grate,'to f linsure .completezjcombustion, and the ashes fallingv` down into the .ash pitzR are scrapedA fffby the Scrapers S, YS. down the-inclined botfurnace -A to af su'itablefplace'of discharge.

lofthe grusher.caeingieprefeiably split and the splits'ert'ioiis 'are Yeingang@d by rightNa-nd 40 j opening. the sect'ion.-sof thelower casingfin :leftfhand lthreaded,Screws Fs, 'to perniitof- .case a p ieceof; iron or like material i accidentally 15p-fed ntitl'rthe coal lntothe Crusher.l @Thus by* the arrangement -de'scrlbed euchv a piece ofv yi'ronran be readily removed/by openiug'the lowersection F2 by the use of the scre'fws FB- to-allow tl'iepiece of iron drop ont of.' the casing, andafter thievhasf been done the sections are-again closed by the Screw rods F?.- vl I V lInthe modified .forni Shown 1n lug; 6, a

y 'Crusher lV' lie provi-ded, having ajpair of .crushing lrollers -W'b'etWeen `which the .coal

` ie'fed, to cansev the ,crushing rollersto crush the sa1ne.- The' crushedniateria-lyie fed by the A traneverse conve-)fers W2 to longitudinally-extendingeonveyers W3 which extend finto the fire. box'B, sothat the cruejhed coal is deliveredgto the grate bars atv the Sides of [conveyors l 72,' lV are driven by Suitable from' the 'Said'. shaft Q, aeV

Having"tliuffdeecribed my invention, AI claunae newa'nd desrreito'seenre,-bvLettere e Patent:J

u `n1.eclialiical Stoker, 'comprising the following inetrunientaliti'es 1in' 'e'`c` `1 `1"1bination,t 111ame1y," a Crusher' forreducing the fuel, a

centrifugalfeed'wheel for feeding the reduced fuelintothe fire'box, delivery I'neans v for conducting the reduced fue] from the said Crusher to the Said feed wheel, the Said feed Wheel bein connected with-and actuated by the eaid de ivery v'mea'ns, a re box having agrate provided with movable Grate bars, an ash remover, a shaft driven rom the said delivery: means, means for. simultaneously.

actuating the said Crusher arid the` said dellvery means, aseco'nd shaft,l means for actu-l ating the grate `bars and the ashremove'r ,from said. second shaft, and a clutch connec- ,tion between the Said second-shaft and the Yshaftdriven from the delivery means.

2. In a mechanical etoker, thev combination with a Crusher for reducing the fuel, a fire box having a ygrate provided. with grate bars mounted to.rock',n1eans fordischarging the fuel into the lire (boil, a `conveyerft'n' re- 'eeiving thel fuel from the-erusher and delivering itto thel said dischargingmeaus, Ia shaftca'rrying' Said' conveyer, the said dischargin' means being connected with and actuated by the said conveyershaft, shafts mounted to rock,l connection between therocking shafts and the grate bars for transmit-ting the rocking motion of the shafts to Said graterbars, a, vertical'shaft mounted to turn and-,connected with t-hesaid rocking Shafts,y to rock' the sa1nea second vertical shaft driven from `the eonveyer shaft, a

,clutch connection between the saidyertical shafte und means vfortactuating the .Quid (frueherandthe conveyor suurultaueously. In uy lrloelnlnlcal Stoker for aA furnace,

the `combination' with a erusher' provided Wit-h an' outlet, u tubular casing;-l connected lwith the outlety of the crusher, a convever iu said'tubular casing,la shaft for-'said conlveyeiga casing connected with the tubular casing and through which the shaft of the conveyor extends, the said caeing being pro,- vided with an outlet leading; to the tire' box `of the furnace, a centrifugal feed wheel in said casing' and' secured to vthe conveyor shaft to lturn therewith, the said feed when] dischargingyinto the outlet of the casing, a grate provided withgrate bars mounted to rock, a vertical shaft, means for rocking' the grate bars lfrom Said shaft, a second vertical Shaft driven from the conveyor shaft, a clutch connection between the vertical shafts, ainl-'J-neans for simultaneously actuating the said crusher and the said conreyer.

.4. Ina mechanical' Stoker for a furnace, a `fire boi hav-iup; a grate provided with. grato bars mounted V*to rock, a` feeding device for a screw conveyer and a shaft for the same from the bottom of the ashpit into the :rh

,an ash remover, a vertical shaft, means for i actuating the grate bars and the ash remover from said vertical shaft, a second vertical shaft driven from the shaft of the conveyor, a clutch connection between the vertical shafts, and means for actuating 'the conve'ver.

In a mechanical stoker for a furnace, the combination with ar Crusher for redneing the fuel, a tire box having a grate provided with movable` grate bars, means for distfharging the fuel into the fire box, a

device for receiving the fuel from the crushcr and delivering it to the said discharging means, the said discharging means being connected with and actuated by the said delivery device,'a vertically disposed shaft, hav ing a clutch member at its upper cud, means fo actuating the said grate bars from the said vertically disposed shaft, a shaft driven from the said delivery device and having a clutch member` mounted to slide on and to turn with the shaft and adapted to engage the clutch. member of said vertically disposed shaft, means for throwingthe clutch members out of engagement with eachother to stop the movement of the grate bars, a main drive shaft and means for actuating the said Crusher and the said delivery device from said shaft.

6. A mechanical Stoker comprising a .crusher for. reducing the fuel, a fire box having a grateprovided with movable grate bars, a feeding device for feeding the reduced fuel into the tire box, an ash pit, a

' conveyer for carrying the ashes from the furnace, meahs for scraping the ashes from the bottom ofthe ash pit into said conveyer, means-for sinnlltaneously actuating the said 'crusher and the said feeding device, a shaft.- driven frmn the feeding device, a second shaft, a clutch connection between said shafts, and means. for actuating the said grate bars,the said scraping means and the said eonveyer from said second shaft.

' 7. The combination with a furnace having a fire box and an' ash pit, of a Crusher for reducing .the fuel, means for discharging the reduced fuel ,into the fire box, a screw conveyer forLreceivin-g the fuel from the crushe-r and delivering it to the said discharging means, a shaft for the conveyer, a grate provided with grate bars mounted to rock, an

ash remover, means for scraping the ashes remover, a vertical shaft` niounted to turn,

f means for actuating the grate hars, the al remover. and the .sera )ing means from .said vertical shaft, a second'vertical shaft driven from the ron \'e \'er shaft'. the. said vertical shafts having clutch members adapted to engage each other, and means for throwinfr the. clnteh members out of engagement with each other o stop the uiovement'of thel grateA bars, the ash remover, and the scraping means.

b'. in a mechanical stoker for a furnace7 a crus-her for reducing the fuel, a fire box. having a. grate provided with gran` bars mounted to rock, a feeding device for reeeivingr the. fuel from the crus-her and feedingit into the tire box, the said feeding deviec ini-hiding a screw convever and a shaft for the same, an ash remover, a vertically disposed shaft means for actuating the grate bars and the lash remover from said vertiextending sidewise, tubular casings into the .1

inner ends of which the said outlets of the crushcr casing open, conveyors in said tubulail casings, a shaft for said conveyers, a tire box having a grate provided with movable orate bars, means for receiving the fuel from the said conveyers and discharging it into the fire box at the sides thereof, the said discharging means being connected with and actuated by the said shaft of the conveyors, means for actuating the conveyer shaft, a vertically disposed shaft mechanism driven from the vertically disposed shaft for imparting movement to the g ate bars, a shaft driven from the conveyer shaft and having a clutch connection with said vertically disposed shaft, and means for disengaging said clutch connection to stop the movement of said grate bars. `In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

THADDIOUS V. ELLIOTT. lVitnesses:

THEO. G. HosTER, EvEnAnu B. MARsHALL.y

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